• Orthopedics is the medical and surgical specialty dedicated to the prevention, diagnosis and treatment of diseases and injuries that affect the musculoskeletal system. The orthopedic specialists of Greenleaf believe in treating our patients as we would treat our own family members – providing personal, high-quality care designed to effectively and safely restore full health and function. We hope that patients will find our offices to be a warm, friendly environment where they will feel comfortable and confident in seeking our services.
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  • A key component in recovering from many orthopaedic injuries is physical therapy. Greenleaf offers individualized physical therapy services at all three of our office location with flexible hours and on-site Greenleaf orthopedic doctors designed to accommodate the patient’s busy schedule. Our physical therapy facilities are clean and bright with state-of-the-art equipment and cheerful, professional staff. Through proven therapy methods, new innovation in therapy procedures and regular communication with our on-site Greenleaf physicians, physical therapy plays a key role in restoring our patients to optimal health.
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  • Workers injured on-the-job can find thorough, effective evaluation and rehabilitative therapy with Greenleaf’s industrial rehabilitation program. Functional capacity evaluations are also performed to evaluate a worker’s ability to return to the duties he was performing before the injury. Nurse case managers will find our offices accommodating and prompt as they work to provide the vital link between patient, physician and employer.
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News & Events

  • January 2014 Jan 15, 2014

    Gregory Caronis, M.D. was nominated by the Advocate Condell medical staff to serve as Member- at -Large on the hospital's Medical Executive Committee. In this capacity, Dr. Caronis will bring his surgical experience and leadership to matters pertaining to hospital operations and practice standards that will ultimately impact Advocate Condell orthopaedic patients.

  • December 2013 Dec 31, 2013

    Dr. Gregory Caronis attended the American Academy of Orthopaedic Surgeons/Orthopaedic Trauma Association meeting on “Strategies and Tactics in Orthopaedic Extremity Trauma.” The course provided Dr. Caronis with the latest techniques in selecting appropriate patients for operative fracture repair as well as surgical techniques to minimize invasiveness and to develop strategies for complicated fracture fixation. Dr. Caronis continues to be one of Advocate Condell’s leading orthopaedic trauma surgeons and

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  • Dr. Mayer is the most amazing doctor. I'm so lucky to have had him do my surgery. He did bilateral TKR 13 years ago on me & I am doing better than most of the people I know that had just one done at a time, even in the last few years. Most of them can't walk well on their own to this day! We are very lucky to have such a great doctor taking care of us!!!"
  • I was pleased to have found Dr. Gregory Caronis, an ankle-foot surgeon in northern Lake County. Dr. Caronis is a caring professional who explains to his patients what's wrong,and the process to fix the problem through physical therapy or surgery. As a patient, you feel like you're the only one in the office. Dr. Caronis truly cares about getting you back on your feet and follows the progression of your recovery.
    Sally M
  • In January of 2009, I had a total knee replacement surgery done buy Dr. John Mayer of Greenleaf Orthopaedics of Libertyville, IL. My care and recovery was outstanding thanks to the surgical skills of Dr. Mayer. He is one of the most outstanding doctors I know - a man who is caring, compassionate, patient and takes the time to listen to you. I was not a number but a respected person. I have been happy to recommend Dr. Mayer several times already and will continue to do so. Greenleaf physical therapists were also a blessing in my recovery.
    Helen D

Locations & Office Hours

Patient Portal


  • Gurnee, IL 847-623-3090
  • Libertyville, IL 847-680-4765
  • Round Lake, IL 224-444-2050

Physical Therapy

  • Gurnee, IL 847-263-8880
  • Libertyville, IL 847-367-9924
  • Round Lake, IL 224-444-2060

Office Hours

  • Monday - Friday 8am to 5pm